The Office star announced the sex of the baby, due in September, on The Tonight Show Tuesday night. This is the first child for Fischer and her husband, screenwriter Lee Kirk.

Fischer's first real-life pregnancy will be written into the upcoming eighth season of The Office. Her character, Pam Halpert, was previously pregnant during the NBC show's sixth season.

In other baby news, Maya Rudolph just revealed that she gave birth to her third child, Jack, on July 3. The baby boy joins the Up All Night star and her longtime partner Paul Thomas Anderson's two daughters, Pearl, 5, and Lucille, 1.